AKIPRESS.COM - The sky above New York City was mysteriously blue on Thursday night. It wasn't an alien invasion.

A transformer explosion at a Con Edison facility in Queens caused a bright blue light that engulfed the sky in the Astoria section of Queens, forcing the temporary closure of LaGuardia Airport and setting off an instant buzz on Twitter, New York based news outlets report.

Mayor Bill de Blasio’s spokesman Eric Phillips tweeted that the lights were attributable to a “blown transformer” at the Queens facility. Fire officials said they were fielding numerous calls for reports of explosions in the Long Island City and Astoria areas.

The Metropolitan Transit Authority said power outages were affecting seven trains.

NYPD says bright blue glow lighting up the New York City area is caused by a transformer explosion at a Con Ed energy company power plant in Queens. https://t.co/h8dUSWg0Ov